<template>
  <div class="topmenu-scroll-wrapper">
    <el-menu
      :default-active="activeMenu"
      mode="horizontal"
      @select="handleSelect"
      class="office-topmenu"
    >
      <template v-for="(item, index) in topMenus">
        <el-menu-item :style="{'--theme': theme}" :index="item.path" :key="index" v-if="index < visibleNumber"
          ><svg-icon :icon-class="item.meta.icon" />
          {{ item.meta.title }}</el-menu-item
        >
      </template>

      <!-- 顶部菜单超出数量折叠 -->
      <el-submenu :style="{'--theme': theme}" index="more" v-if="topMenus.length > visibleNumber">
        <template slot="title">更多菜单</template>
        <template v-for="(item, index) in topMenus">
          <el-menu-item
            :index="item.path"
            :key="index"
            v-if="index >= visibleNumber"
            ><svg-icon :icon-class="item.meta.icon" />
            {{ item.meta.title }}</el-menu-item
          >
        </template>
      </el-submenu>
    </el-menu>
  </div>
</template>

<script>
import { constantRoutes } from "@/router";

// 隐藏侧边栏路由
const hideList = ['/index', '/user/profile'];

export default {
  data() {
    return {
      // 顶部栏初始数
      visibleNumber: 5,
      // 当前激活菜单的 index
      currentIndex: undefined
    };
  },
  computed: {
    theme() {
      return this.$store.state.settings.theme;
    },
    // 顶部显示菜单
    topMenus() {
      let topMenus = [];
      this.routers.map((menu) => {
        if (menu.hidden !== true) {
          // 兼容顶部栏一级菜单内部跳转
          if (menu.path === "/") {
              topMenus.push(menu.children[0]);
          } else {
              topMenus.push(menu);
          }
        }
      });
      return topMenus;
    },
    // 所有的路由信息
    routers() {
      return this.$store.state.permission.topbarRouters;
    },
    // 设置子路由
    childrenMenus() {
      var childrenMenus = [];
      this.routers.map((router) => {
        for (var item in router.children) {
          if (router.children[item].parentPath === undefined) {
            if(router.path === "/") {
              router.children[item].path = "/" + router.children[item].path;
            } else {
              if(!this.ishttp(router.children[item].path)) {
                router.children[item].path = router.path + "/" + router.children[item].path;
              }
            }
            router.children[item].parentPath = router.path;
          }
          childrenMenus.push(router.children[item]);
        }
      });
      return constantRoutes.concat(childrenMenus);
    },
    // 默认激活的菜单
    activeMenu() {
      const path = this.$route.path;
      let activePath = path;
      if (path !== undefined && path.lastIndexOf("/") > 0 && hideList.indexOf(path) === -1) {
        const tmpPath = path.substring(1, path.length);
        activePath = "/" + tmpPath.substring(0, tmpPath.indexOf("/"));
        this.$store.dispatch('app/toggleSideBarHide', false);
      } else if(!this.$route.children) {
        activePath = path;
        this.$store.dispatch('app/toggleSideBarHide', true);
      }
      this.activeRoutes(activePath);
      return activePath;
    },
  },
  beforeMount() {
    window.addEventListener('resize', this.setVisibleNumber)
  },
  beforeDestroy() {
    window.removeEventListener('resize', this.setVisibleNumber)
  },
  mounted() {
    this.setVisibleNumber();
  },
  methods: {
    // 根据宽度计算设置显示栏数
    setVisibleNumber() {
      const width = document.body.getBoundingClientRect().width;
      if (width < 600) {
        this.visibleNumber = 2;
      } else if (width < 900) {
        this.visibleNumber = 3;
      } else {
        this.visibleNumber = parseInt(width / 255);
      }
    },
    // 菜单选择事件
    handleSelect(key, keyPath) {
      this.currentIndex = key;
      const route = this.routers.find(item => item.path === key);
      if (this.ishttp(key)) {
        // http(s):// 路径新窗口打开
        window.open(key, "_blank");
      } else if (!route || !route.children) {
        // 没有子路由路径内部打开
        this.$router.push({ path: key });
        this.$store.dispatch('app/toggleSideBarHide', true);
      } else {
        // 显示左侧联动菜单
        this.activeRoutes(key);
        this.$store.dispatch('app/toggleSideBarHide', false);
      }
    },
    // 当前激活的路由
    activeRoutes(key) {
      var routes = [];
      if (this.childrenMenus && this.childrenMenus.length > 0) {
        this.childrenMenus.map((item) => {
          if (key == item.parentPath || (key == "index" && "" == item.path)) {
            routes.push(item);
          }
        });
      }
      if(routes.length > 0) {
        this.$store.commit("SET_SIDEBAR_ROUTERS", routes);
      }
    },
    ishttp(url) {
      return url.indexOf('http://') !== -1 || url.indexOf('https://') !== -1
    }
  },
};
</script>

<style lang="scss">
.topmenu-scroll-wrapper {
  overflow-x: auto;
  white-space: nowrap;
  width: 100%;
  display: flex;
  justify-content: center;
  &::-webkit-scrollbar {
    display: none;
  }
}
.office-topmenu {
  display: inline-flex !important;
  margin: 0 auto !important;
  float: none !important;
}
.topmenu-container.el-menu--horizontal {
  background: transparent;
  border: none;
  
  > .el-menu-item {
    float: left;
    height: 64px !important;
    line-height: 64px !important;
    color: #595959 !important;
    padding: 0 20px !important;
    margin: 0 4px !important;
    border-radius: 12px !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    position: relative !important;
    overflow: hidden !important;
    
    &:hover {
      background: linear-gradient(135deg, rgba(24, 144, 255, 0.08) 0%, rgba(24, 144, 255, 0.04) 100%) !important;
      color: #1890ff !important;
      transform: translateY(-2px) !important;
      
      .svg-icon {
        transform: scale(1.1) !important;
        color: #1890ff !important;
      }
    }
    
    &.is-active {
      background: linear-gradient(135deg, #1890ff 0%, #40a9ff 100%) !important;
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3) !important;
      
      .svg-icon {
        color: #ffffff !important;
      }
      
      &::after {
        content: '' !important;
        position: absolute !important;
        bottom: 0 !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        width: 24px !important;
        height: 3px !important;
        background: linear-gradient(90deg, #52c41a 0%, #fa8c16 100%) !important;
        border-radius: 2px !important;
      }
    }
    
    .svg-icon {
      margin-right: 8px !important;
      font-size: 16px !important;
      transition: all 0.3s ease !important;
      color: #595959 !important;
    }
  }
  
  > .el-submenu {
    .el-submenu__title {
      float: left;
      height: 64px !important;
      line-height: 64px !important;
      color: #595959 !important;
      padding: 0 20px !important;
      margin: 0 4px !important;
      border-radius: 12px !important;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
      position: relative !important;
      overflow: hidden !important;
      
      &:hover {
        background: linear-gradient(135deg, rgba(24, 144, 255, 0.08) 0%, rgba(24, 144, 255, 0.04) 100%) !important;
        color: #1890ff !important;
        transform: translateY(-2px) !important;
        
        .svg-icon {
          transform: scale(1.1) !important;
          color: #1890ff !important;
        }
      }
      
      &.is-active {
        background: linear-gradient(135deg, #1890ff 0%, #40a9ff 100%) !important;
        color: #ffffff !important;
        box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3) !important;
        
        .svg-icon {
          color: #ffffff !important;
        }
        
        &::after {
          content: '' !important;
          position: absolute !important;
          bottom: 0 !important;
          left: 50% !important;
          transform: translateX(-50%) !important;
          width: 24px !important;
          height: 3px !important;
          background: linear-gradient(90deg, #52c41a 0%, #fa8c16 100%) !important;
          border-radius: 2px !important;
        }
      }
      
      .svg-icon {
        margin-right: 8px !important;
        font-size: 16px !important;
        transition: all 0.3s ease !important;
        color: #595959 !important;
      }
    }
  }
}
@media (max-width: 900px) {
  .topmenu-container.el-menu--horizontal > .el-menu-item,
  .topmenu-container.el-menu--horizontal > .el-submenu .el-submenu__title {
    padding: 0 10px !important;
    font-size: 14px !important;
    height: 48px !important;
    line-height: 48px !important;
  }
}
@media (max-width: 600px) {
  .topmenu-container.el-menu--horizontal > .el-menu-item,
  .topmenu-container.el-menu--horizontal > .el-submenu .el-submenu__title {
    padding: 0 6px !important;
    font-size: 12px !important;
    height: 40px !important;
    line-height: 40px !important;
  }
}
// 新增：去除更多菜单激活时的蓝色底块
.office-topmenu .el-menu--horizontal > .el-submenu .el-submenu__title.is-active {
  background: transparent !important;
  color: #1890ff !important;
  box-shadow: none !important;
}
</style>
